static ssize_t silent_store()

in speakup/kobjects.c [332:366]

• 34 lines of code
• 8 McCabe index (conditional complexity)

static ssize_t silent_store(struct kobject *kobj, struct kobj_attribute *attr,
			    const char *buf, size_t count)
{
	int len;
	struct vc_data *vc = vc_cons[fg_console].d;
	char ch = 0;
	char shut;
	unsigned long flags;

	len = strlen(buf);
	if (len > 0 && len < 3) {
		ch = buf[0];
		if (ch == '\n')
			ch = '0';
	}
	if (ch < '0' || ch > '7') {
		pr_warn("silent value '%c' not in range (0,7)\n", ch);
		return -EINVAL;
	}
	spin_lock_irqsave(&speakup_info.spinlock, flags);
	if (ch & 2) {
		shut = 1;
		spk_do_flush();
	} else {
		shut = 0;
	}
	if (ch & 4)
		shut |= 0x40;
	if (ch & 1)
		spk_shut_up |= shut;
	else
		spk_shut_up &= ~shut;
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	return count;
}